Missing Encryption of Sensitive Data Vulnerability in Apache Tomcat

CVE-2026-34486

What is CVE-2026-34486?

CVE-2026-34486 is a vulnerability identified in certain versions of Apache Tomcat, a widely used open-source application server for running Java Servlets and JavaServer Pages. This particular vulnerability stems from the missing encryption of sensitive data, which has arisen due to an adjustment made in response to a previous vulnerability (CVE-2026-29146). The modification inadvertently allows for the bypass of the EncryptInterceptor, a component responsible for ensuring that sensitive information is properly encrypted during processing. As such, organizations relying on affected versions of Apache Tomcat (specifically versions 11.0.20, 10.1.53, and 9.0.116) may face significant risks as sensitive data could be exposed to unauthorized access, leading to potential data breaches and compliance violations.

Potential impact of CVE-2026-34486

1. Data Exposure: The primary concern with CVE-2026-34486 is the risk of sensitive data being transmitted or stored in an unencrypted format, making it accessible to malicious actors. This could include personal information, credentials, and business-critical data, resulting in severe privacy violations.

2. Compliance Risks: Organizations that handle sensitive data are often subject to regulations (such as GDPR, HIPAA, etc.) requiring proper encryption standards. Failure to comply due to this vulnerability could lead to legal ramifications, including fines and sanctions, as well as damaging reputational impacts.

3. Increased Attack Surface: The nature of the vulnerability increases the attack surface for potential exploits. Attackers exploiting this flaw can gain unauthorized access to sensitive data or leverage it for further attacks, amplifying the risk of system compromise and broader network vulnerabilities.

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